Port Description:
PWR IN:4.4~6V power input terminal. You should connect it to a solar battery. The maximum output voltage of the solar battery should bein the range of 4.4V to 6V.
BAT: Connect a 3.7V lithium battery, for storing electricity.
VOUT: Lithium-ion battery output. Connect your electrical equipment to it.
Charging Indicator: When there are no battery, the green LED is ON and the red LED is flashing. When charging, only the red LED is ON.After the charging is completed, only the green LED is ON.
Application
Material:
Solar Panel (5v 260mA) (https://www.dfrobot.com/index.php?
route=product/product&filter_name=solar&product_id=996#.U3Mhm_mSyCk)
[Solar Charger]
3.7V Polymer Lithium Ion Battery - 1000mAh (https://www.dfrobot.com/index.php?
route=product/product&filter_name=3.7&product_id=437#.U3Mh7fmSyCk)